I understand what do you mean and probably you are right but it blows my mind the fact that is an alimentation port for speackers at the back of the screen. And on Amazon I founded a review which mentions this aspect.
Maybe I am just dumb and didn't understood the use for that alimentation port.
Here is a photo took by me at the back of the monitor:
And here is the link to Amazon:
https://www.amazon.com/DELL-P190ST-FLAT-PANEL-MONITOR/dp/B014S21EKA